Try using cache in GetListForBlock before reading from disk (#2253)
Try using cache in GetListForBlock before reading from disk (#2253)

* Try using cache in GetListForBlock before reading from disk

* Use std::list for vecDiff

ivansib/sibcoin,ivansib/sibcoin,ivansib/sibcoin,ivansib/sibcoin,ivansib/sibcoin,ivansib/sibcoin